Question 394068
{{{Area = 35}}}
{{{Area = L * W}}}
{{{L = W + 6}}}
{{{W = W}}}

So just multiply the L and W and make it equal to the Area

{{{W(W+6) = 35}}}
{{{W^2 + 6W = 35}}}
{{{W^2 + 6W - 35 = 0}}}

you need to use the quadratic formula now to get W 
W ends up being about {{{3.63}}} so now to get the L , just add 6
{{{3.63 + 6 = 9.63}}}
So the answer is 
{{{L = 9.63}}}
{{{W = 3.63}}}